Home / 2,278.05-3,143.64-1,283.25

Finding the Fourth Proportional to 2,278.05, 3,143.64 and 1,283.25

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Solution

The fourth proportional to 2,278.05, 3,143.64 and 1,283.25 is: 1,770.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.05 : 3,143.64 = 1,283.25 : x
  2. Step 2: Convert to fraction form
    2,278.05/3,143.64 = 1,283.25/x
  3. Step 3: Cross multiply
    2,278.05x = 3,143.64 × 1,283.25
  4. Step 4: Simplify right side
    2,278.05x = 4,034,076.03
  5. Step 5: Solve for x
    x = 4,034,076.03/2,278.05
  6. Step 6: Final answer
    x = 1,770.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.